Container-duster for insecticide powder



June 22, 1937. E. B. HUNN 2,084,493

CONTAINER DUSTER FOR INSECTICIDE POWDER Filed March 1, 1935 Patented June 22, 1937 POWD R Edward B. Hunn, Crantord, N."J., assignor to Stanco Inc.

Application March 1, 1935, Serial No.'8,'l94

3 Claims.

This invention relates to improvements in insecticide powder containers and dusters, and relates particularly to improvements in insecticide powder containers which are also used as dusters..

The hand operated dusters which are now marketed for applying insecticide and fungicidal powders are of the same general design consisting of a powder container at the head end of the duster in back of which is the usual type of cylinder and piston or plunger which is operated by means of a handle. The cheapest of these dusters is made up of a single long cylinder of metal or cardboard, the front end of the cylinder being divided oil into a separate compartment to hold 15 the powder; the rear portion of the cylinder contains a movable plunger or piston which is used to force air through the powder compartment giving a cloud of dust. A numberof types of air valves (inserted in the wall between the dust 2o compartment and the piston compartment) and outlet nozzles (at the head end of the duster) are in common usage. The designof these governs largely the efiiciency of mixing of air and pow,- der, giving a more or less uniform distribution of 26 dustvfrom the nozzle.

These dusters operate very efliclently, the main disadvantage being that the cost of the duster is high considering the amount of powder which it will hold. Ordinarily, the powder compartment 80 occupies only 30 to 40% of the total volume of the duster and a duster which will hold a pound of powder, which amount is desirable from a practical standpoint (because of the nuisance and delay due to necessary frequent refilling 35 when smaller capacity dusters are used), not only becomes unwieldy in size but excessive in cost.

An object of this invention is to provide a commercial container for insecticide powder which is also used as a duster to discharge a cloud of finely 40 divided insecticide powder from an outlet of the container. I

Another object is to provide an insecticide powder container in which the body of the duster, which contains insecticide powder, is used as the 45 piston or plunger of the pump.

Another object of this invention is to provide a container-duster in which practically the entire space occupied by the container duster is filled with powder. This makes it possible, for

50 a given quantity of powder, to have the smallest possible duster, which is advantageous from the standpoint of cost of construction and cost of packing and shipping.

Other objects and advantages will be apparent on from the following description considered in conjunction with the accompanying drawing, in which I Fig. 1 is a perspective side and front end view of the container-duster,

Fig. 2 is a longitudinal vertical section of the 5 container-duster,

. Fig. 3 is a longitudinal vertical section of the container, I

Fig. 4 is a longitudinal vertical section of the outer sleeve that fits over the head end of the container,

Fig. 5 is a. longitudinal vertical section of the outer slidingsleeve that fits over the rear end of the container,

Fig. 6 is a sectional view taken on the line 2-4 of Fig. 2,

Fig. '7 is a sectional view taken on the line 3-3 of Fig. 2, and

Fig. 8 is a sectional view taken on the line 4-4 of Fig. 5.

Referring to the drawing, numeral I designates a container which is cylindrical in form, with an open end 2 and a closed end 3. The container I is. constructed of a fibrous material. preferably cardboard. The closure at 3 is provided with an inlet opening 4 to which is attached a flexible tube 5 formed for example of rubber. The flexible tube 5 is provided with a heavy plug 5 on the end and a slit I so that air may only pass in one direction inwardly into the container I. The heavy plug 6 serves to maintain the slit 1 in the lowest portion of the container I.

An outer close fitting cylindrical sleeve 8, with an open end 9 and a closed end Ill is provided which is used to cover the open end 2 of thecontainer I. This outer sleeve 8 is held by friction when it is forced over to enclose a portion of the container I. A small quantity of adhesive, such as glue, may be used to hold sleeve 8 and container I in position. A T-tube II provided with an outlet nozzle I2 serves as an outlet through the closed end I0. Outlet nozzle I2 is closed with a slip or screw cap I3. The ends I I of the cross tube IIa of the T-tube are compressed or fiattened, by which meansthe quantity of the powder expelled may be regulated.

A slidable cylinder cover I5 with an open end I5 and a closed end I1 is provided to enclose the closed end 3 and a portion of container I. The cover I5 is provided with inlet valves or openings I8 in the closed end ll of cover I5. These valves or openings I8 are covered from the inside with a fiat fibrous material, such as paper, held in position by rivet or bolt I9 to form a type of a "flap valve, which will allow air to pass freely into cylinder cover I! when suction is exerted from the inside but will not allow any air to escape outwardly through this valve when the air filled with the finely powdered insecticidal material and the open end slid into outer close-fitting sleeve 8.

shipped until it is used.

When it is to be used, cap it is removed and the cover I together with container I is firmly held while cover I 5 is moved or slid alternately backwards and forwards to force air through container i and air and dust through outlet II.

The foregoing description is merely illustrative and various changes and alternative arrangements may be made within the scope of the appended claims in which it is my intention to claim all inherent novelty in'the invention as broadly as the prior art permits.

I claim:

1. In an apparatus for storing .and spraying powdered material, the combination of a fibrous cylindricalcontainer for powdered material, an outer telescoping cover member having a sliding fit over the cylindrical container and adapted to i be reciprocated thereover, the cylindrical container being provided on one end with a closure having a narrow constricted outlet, and the other end of the cylindrical container having a closure with a narrow constricted inlet, a flexible tube mounted in the inlet, said tube being weighted to maintain the inner end thereof in the lowest portion of the container and slitted to allow air to pass into the cylindrical container through the powdered material therein, and a closure on one end of the outer telescopix cover member'with air inlets adapted to pass air intothe outer telescoping cover member, the walls of the cylindrical container and the outer telescoping cover member being adapted to serve as an air seal.

spasms The outlet I2 is covered with the cap I! and the container-duster may be stored or 2. In an apparatus for storing and spraying powdered material, the combination of a cylindrical container for powdered telescoping cover member having a sliding fit over the cylindrical container andadapted to be reciprocated thereover, the cylindrical container being provided on one end with a closure having a narrow constricted outlet, said narrow con- I 'stricted outlet being arrangedon the inside of the cylindrical container with a T-member having partially constricted openings at the ends of the cross member of the T-member, the other end of the cylindrical container having a closure with a narrow constricted inlet. a weighted flexible tube mounted in the inlet, said narrow constricted inlet being slitted to allow air to pass into the,

cylindrical container, and a closure'on one end of the outer telescoping cover member having air inlets adapted to allow air to pass into the outer telescoping cover member, the walls of the cylindrical container and the outer telescoping cover member being adapted to serve as an air seal.

3.- In an apparatus for powdered material, the combination of drical container for powdered material having a closure for one end comprising a disc secured to the walls of the container and having a centrally disposed opening therein adapted to receive a flexible elongated tubular member into the container, a lateral slit in said member adjacent the inner end forming a self-closing opening therein, a weighted plug for the inner end of the tubular member adapted to depress said end whereby the slit will be submerged in the contents of the container at all times,a cylindrical compression member telescopically associated with the container forming a compression chamber communicating with the container through said elongated tubular member, and a friction fitted cylindrical sleeve telescopically disposed over the other end of the container,- said storing and spraying a cylin material,- an outer extending sleeve having a closed end with an outlet nozzle therein.

EDWARD B. HUNN. 

